Spectral Photoluminescent Parameters of Barley Seeds (Hordéum vulgáre) Infected with Fusarium ssp

• Published in: Photochemistry and photobiology 2023-01, Vol.99 (1), p.29-34
• Main Authors: Moskovsky, Maxim N., Shogenov, Yuri H., Lavrov, Alexander V., Gulyaev, Anatoly A., Efremenkov, Igor Yu, Pyatchenkov, Denis S., Belyakov, Mikhail V.
• Format: Article
• Language: English
• Subjects: Clean technology; Excitation spectra; Frequency spectrum; Fusarium; Hordeum - microbiology; Hordeum vulgare; Infections; Kurtosis; Luminescence; Photoluminescence; Photons; Plant diseases; Radiation; Seeds; Wave excitation; Wavelengths
• ISSN: 0031-8655; 1751-1097
• DOI: 10.1111/php.13645

We needed effective and sustainable technologies for better microbiological control of crops, including Fusarium. However, photoluminescent UV–Vis methods are potential for diagnosing plant diseases with Fusarium. It has not been sufficiently studied despite the application of these methods for other biological researches. The excitation spectrum of the seeds during infection shifts to the shorter wavelength and a new maximum appears in the region λ ≈ 232 nm. The photoluminescence of infected seeds increases with excitation by radiation of wavelengths λe,1 = 232 nm, λe,2 = 362 nm and λe,3 = 424 nm by 1.33–3.14 times, and λe,3 = 424 nm—decreases by 1.1 times. Statistical moments μ3 and μ4, asymmetry and kurtosis change only with short‐wave excitation. When analyzing the decomposition of the frequency spectrum into Gaussian curves, the most informative ratio is the ratio of right‐handed and left‐handed Gaussians under excitation λe,2 = 362 nm and λe,3 = 424 nm. The ratios of their maxima change during infection by 1.36–3.2 times, and for excitation by radiation λe,2, the frequency boundaries of Gaussians change. The results of measurements and calculations provide a basis for the development of a method and device for photoluminescence diagnostics of fusarium seeds in UV–Vis ranges. Studying potential photoluminescent UV–Vis methods for diagnosing diseases of agricultural plants with fusarium is an urgent task. Spectral characteristics of excitation and photoluminescence during fusarium infection change qualitatively and quantitatively. When analyzing the decomposition of the luminescence frequency spectrum into Gaussian curves, the ratio of right and left Gaussians at excitation λ = 362 nm is most informative. The ratios of their maxima change with infection by 1.36…3.2 times, and the boundaries of Gaussians change in frequency. The results provide the basis for the development of a technique and device for photoluminescent diagnostics of fusarium seeds in the UV–Vis ranges.